If Mars still had oceans and active volcanism it might have resembled Lanzarote.

Ashy red dunes draped between smooth black rocks. The rocks perforated by tiny ejaculants of xenolith green olivine. Peridot pebbles interspersed throughout black silt. Beaches from which gradients of sparkling moisture recede, the reflection resembling the relaxing muscles of a black horse in the sun, following a draining wave.